Digital rights and juggling resources in the public domain.

My app has a library of juggling tricks. Each trick has a name, animation, capacity, difficulty level, description, and a video tutorial. Other sites (Juggling Wiki, Library of Juggling, and others) have already created data for this library. For the purposes of my app, it would be very useful to have this data consolidated into a single JSON file. Do I have the rights to do this? Can I combine the data from Juggle Wiki, Library of Juggling, and other sites into a single JSON file, and then use it in my app?

Please provide any insight or opinion you may have on this matter.

Can I copy user-generated text from a site like Wikipedia or Juggle Wiki?

As I understand it, copyright law in most countries says you cannot use any of these resources unless the copyright owner has said you can.

Check the licensing conditions on all the websites concerned to see if they have put the resources in the public domain or otherwise licensed them for wider use (for example using Creative Commons licensing).

You could also approach the site owners to ask them.

Often copyright owners will be more receptive to licensing content to not-for-profit endeavours. So if your app is free and doesn't have adverts they might be more inclined to let you use their content.

.. plus including a general passage in the app, like "Any software, videos, sites linked to in this app carry property and credit to their owners." plus "Please contact, if you feel any your rights offended!" or alike.

Great, thanks for the link. That license means that I can share and adapt the work, as long as I attribute and share alike. I have consolidated the data, and it is available here in .csv format, and JSON.